JP2005070656A5 - - Google Patents
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- JP2005070656A5 JP2005070656A5 JP2003303252A JP2003303252A JP2005070656A5 JP 2005070656 A5 JP2005070656 A5 JP 2005070656A5 JP 2003303252 A JP2003303252 A JP 2003303252A JP 2003303252 A JP2003303252 A JP 2003303252A JP 2005070656 A5 JP2005070656 A5 JP 2005070656A5
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Claims (18)
前記映像信号の輝度情報を制御する第１の制御部と、
前記第１の制御部により制御された輝度情報に基づき前記表示部の画面に照射されるバックライトの照度を制御する第２の制御部と、
を備えることを特徴とする表示部駆動回路。 In the display unit driving circuit for a video display apparatus displaying video on the display unit based on a video signal,
A first control unit for controlling luminance information of the video signal;
A second control unit for controlling the illuminance of the backlight irradiated on the screen of the display unit based on the luminance information controlled by the first control unit;
Display driving circuit comprising: a.
前記第１の制御部はフィードバック系を構成して前記輝度情報を制御することを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 1 ,
The display unit driving circuit, wherein the first control unit constitutes a feedback system to control the luminance information .
前記第２の制御部はフィードフォワード系を構成して前記表示部の画面に照射されるバックライトの照度を制御することを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 1 ,
The display unit driving circuit, wherein the second control unit constitutes a feedforward system and controls the illuminance of the backlight irradiated on the screen of the display unit.
前記第２の制御部は前記第１の制御部により制御された輝度情報の平均輝度情報に基づき前記表示部の画面に照射されるバックライトの照度を制御することを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 1 ,
The second control unit controls the illuminance of the backlight irradiated on the screen of the display unit based on the average luminance information of the luminance information controlled by the first control unit. .
前記第２の制御部は、前記平均輝度情報が第１の所定値よりも高いときは前記バックライトの照度を増大させることを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 4,
The display unit driving circuit, wherein the second control unit increases the illuminance of the backlight when the average luminance information is higher than a first predetermined value .
前記第２の制御部は、前記平均輝度情報が第２の所定値よりも低いときは前記バックライトの照度を減少させることを特徴とする表示部駆動回路。 In the display unit drive circuit according to claim 4 or 5 ,
The display unit driving circuit, wherein the second control unit reduces the illuminance of the backlight when the average luminance information is lower than a second predetermined value .
前記第１の制御部により制御された輝度情報に基づき前記映像信号の色信号情報を変え前記表示部に表示される映像の色補正を行う第３の制御部を備えることを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 1,
A display unit, comprising: a third control unit that changes color signal information of the video signal based on luminance information controlled by the first control unit and performs color correction of a video displayed on the display unit. Driving circuit.
前記第１の制御部はＡ／Ｄ変換したデジタル輝度信号の所定期間内の最大輝度情報が該当する輝度領域と平均輝度情報が該当する輝度領域とを判定し、前記判定した両輝度領域の情報をフィードバックして輝度情報を変え、前記表示部の映像のコントラストを調整するように制御し、
前記第２の制御部は前記平均輝度情報が予め設定された基準範囲の上限値よりも高いときは前記表示部の画面に照射されるバックライトの照度を増大させ、前記平均輝度情報が前記基準範囲の下限値よりも低いときは前記照度を減少させるように制御することを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 1,
The first control unit determines a luminance region corresponding to the maximum luminance information within a predetermined period of the A / D converted digital luminance signal and a luminance region corresponding to the average luminance information, and information on the determined both luminance regions Feedback to change the brightness information, and control to adjust the contrast of the image on the display unit,
The second control unit increases the illuminance of the backlight irradiated on the screen of the display unit when the average luminance information is higher than an upper limit value of a preset reference range, and the average luminance information is A display unit driving circuit which controls to reduce the illuminance when lower than a lower limit value of the range .
前記第２の制御部は、前記平均輝度情報が前記基準範囲の上限値よりも高いとき、前記上限値を超える第１の領域では前記バックライトの照度を前記平均輝度情報の増大につれて増大させ、前記第１の領域よりも平均輝度情報がさらに高い第２の領域では前記照度の増大を抑えて約一定にし、また、前記平均輝度情報が前記基準範囲の下限値よりも低いとき、前記下限値を超える第３の領域では前記バックライトの照度を前記平均輝度情報の減少につれて減少させ、前記第３の領域よりも平均輝度情報がさらに低い第４の領域では前記照度の減少を抑えて約一定にするよう制御することを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 8,
When the average brightness information is higher than the upper limit value of the reference range, the second control unit increases the illuminance of the backlight as the average brightness information increases in the first region exceeding the upper limit value, In the second region where the average luminance information is higher than that in the first region, the increase in the illuminance is suppressed to be approximately constant, and when the average luminance information is lower than the lower limit value of the reference range, the lower limit value In the third area exceeding the above, the illuminance of the backlight is decreased as the average luminance information decreases, and in the fourth area where the average luminance information is lower than that of the third area, the decrease in the illuminance is suppressed to be approximately constant. A display portion driver circuit which is controlled to be
前記第１の制御部が判定した両輝度情報に基づき前記映像信号の色情報を変え前記表示部に表示される映像の色補正を行う第３の制御部を備えることを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 8,
A display unit drive comprising a third control unit that changes color information of the video signal based on both luminance information determined by the first control unit and corrects the color of the video displayed on the display unit. Circuit .
前記第１の制御部により制御された輝度情報に基づき前記映像信号の黒伸張処理を行う第４の制御部を備えることを特徴とする表示部駆動回路。 The display unit driving circuit according to claim 1,
A display unit driving circuit, comprising: a fourth control unit that performs black expansion processing of the video signal based on luminance information controlled by the first control unit .
前記第１の制御部により判定された平均輝度情報が該当する輝度領域に基づいて前記映像信号の黒伸張処理を行う第４の制御部を備えることを特徴とする表示部駆動回路。 In the display unit drive circuit according to claim 8 or 10,
A display unit drive circuit, comprising: a fourth control unit that performs black extension processing of the video signal based on a luminance region to which the average luminance information determined by the first control unit corresponds .
デジタル輝度信号の所定期間内の最大輝度情報と平均輝度情報とを検出する輝度情報検出回路と、
前記検出した最大輝度情報が該当する第１の輝度領域と前記平均輝度情報が該当する第２の輝度領域とを判定し、前記判定した第１の輝度領域の情報と第２の輝度領域の情報、または前記第２の輝度領域の情報に基づき、Ａ／Ｄ変換前のアナログ輝度信号またはＡ／Ｄ変換後のデジタル輝度信号のいずれか一方または両方のゲインを制御する第１のマイコンと、
前記表示部の画面に照射されるバックライトの照度を制御するバックライト制御回路と、
前記第１のマイコンからの前記第２の輝度領域の情報に基づき前記バックライト制御回路を、前記平均輝度情報が予め設定された基準範囲の上限値よりも高いときは前記バックライトの照度を増大させ、前記平均輝度情報が前記基準範囲の下限値よりも低いときは減少させるように制御する第２のマイコンと、
デジタル色信号とデジタル輝度信号とに基づき赤、緑、青のデジタル映像信号を形成し出力するカラーマトリックス回路と、
表示パネルと、
バックライト発生部と、
バックライトが画面に照射された状態で前記カラーマトリックス回路から出力されるデジタル映像信号により映像表示を行う表示部と、
を備えることを特徴とする映像表示装置。 A video display apparatus for displaying an image on the display unit based on the digital video signal,
A luminance information detection circuit for detecting maximum luminance information and average luminance information within a predetermined period of the digital luminance signal ;
The first luminance region corresponding to the detected maximum luminance information and the second luminance region corresponding to the average luminance information are determined, and the determined first luminance region information and second luminance region information are determined. Or a first microcomputer that controls the gain of one or both of the analog luminance signal before A / D conversion and the digital luminance signal after A / D conversion based on the information of the second luminance region ;
A backlight control circuit for controlling the illuminance of the backlight applied to the screen of the display unit ;
Increasing the illuminance of the backlight wherein the backlight control circuit on the basis of information of the second luminance area from the first microcomputer, the average when the brightness information is higher than the upper limit value of a preset reference range A second microcomputer that controls the average luminance information to decrease when the average luminance information is lower than a lower limit value of the reference range ;
A color matrix circuit for forming and outputting red, green and blue digital video signals based on the digital color signal and the digital luminance signal;
A display panel;
A backlight generation unit;
A display unit for displaying a video by a digital video signal output from the color matrix circuit in a state where a backlight is illuminated on the screen;
Video display apparatus comprising: a.
前記第１、第２のマイコンのうちいずれか一方または両方は、前記表示部が画面にバックライトが照射される構成であるか否かを判別し、バックライトが照射される構成である場合に、前記第１の制御回路を制御し前記バックライトの照度を制御可能にすることを特徴とする映像表示装置。 The video display device according to claim 13.
Either one or both of the first and second microcomputers determine whether the display unit is configured to irradiate a backlight to the screen, and when the configuration is configured to irradiate the backlight. An image display device that controls the first control circuit to control the illuminance of the backlight .
前記第１、第２のマイコンのうちいずれか一方または両方は前記表示部の種類情報を含むＩＤ情報に基づき前記表示部が画面に前記バックライトが照射される構成であるか否かを判別し、前記判別の結果、前記表示部がバックライトが照射される構成である場合に前記第２のマイコンが前記バックライト制御回路を制御することを特徴とする映像表示装置。 The video display device according to claim 14,
One or both of the first and second microcomputers determine whether or not the display unit is configured to irradiate the backlight on the screen based on ID information including the type information of the display unit. the determination result, the image display device, wherein the second microcomputer when the display unit is configured to backlight is irradiated controls the backlight control circuit.
Ａ／Ｄ変換前のアナログ輝度信号またはＡ／Ｄ変換後のデジタル輝度信号のいずれか一方または両方のゲインを変化させるビデオアンプと、
前記輝度情報検出回路により検出した輝度情報に基づき前記映像信号の色情報を変え前記表示部に表示される映像の色補正を行う色補正回路と、
を備え、前記第１、第２のマイコンのうちいずれか一方または両方は、前記表示部のＩＤ情報に基づき前記表示部が画面に前記バックライトが照射される構成であるか否かを判別するとともに、少なくとも、前記ビデオアンプ、前記色補正回路のいずれか一方または両方の回路設定条件を変え、前記表示部に対応したものとすることを特徴とする映像表示装置。 The video display device according to claim 14,
A video amplifier that changes the gain of one or both of an analog luminance signal before A / D conversion and a digital luminance signal after A / D conversion;
A color correction circuit that changes the color information of the video signal based on the luminance information detected by the luminance information detection circuit and corrects the color of the video displayed on the display unit;
One or both of the first and second microcomputers determine whether the display unit is configured to irradiate the backlight on the screen based on the ID information of the display unit In addition, a video display device characterized by changing circuit setting conditions of at least one of or both of the video amplifier and the color correction circuit and corresponding to the display unit .
ゲインをフィードバック制御された輝度信号の輝度情報を検出するステップと、Detecting luminance information of a luminance signal whose gain is feedback controlled;
前記検出した輝度情報を予め設定された基準範囲と比較するステップと、Comparing the detected luminance information with a preset reference range;
前記比較の結果、前記輝度情報が前記基準範囲の上限値よりも高いときは前記表示部の画面に照射されるバックライトの照度を増大させ、前記輝度情報が前記基準範囲の下限値よりも低いときは前記照度を減少させるように制御するステップと、As a result of the comparison, when the luminance information is higher than the upper limit value of the reference range, the illuminance of the backlight irradiated on the screen of the display unit is increased, and the luminance information is lower than the lower limit value of the reference range When controlling to reduce the illuminance,
を経て、バックライトを照射した状態で前記表示部に映像表示を行う映像表示方法。And a video display method for performing video display on the display unit in a state where a backlight is irradiated.
前記表示部が画面に前記バックライトが照射される構成であるか否かを判別するステップを有し、Determining whether the display unit is configured to irradiate the backlight on the screen;
前記比較するステップは、前記判別の結果、前記表示部がバックライトが照射される構成である場合に、前記検出した輝度情報を予め設定された基準範囲と比較することを特徴とする映像表示方法。The comparing step compares the detected luminance information with a preset reference range when the display unit is configured to illuminate a backlight as a result of the determination. .
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003303252A JP4927311B2 (en) | 2003-08-27 | 2003-08-27 | VIDEO DISPLAY DEVICE, DISPLAY UNIT DRIVE CIRCUIT USED FOR THE SAME |
| GB0415856A GB2405520B (en) | 2003-08-27 | 2004-07-15 | Image display apparatus, display unit driver and image display method for the same |
| US10/893,989 US7333081B2 (en) | 2003-08-27 | 2004-07-20 | Image display apparatus, display unit driver and image display method for the same |
| CNB2004100708331A CN100382590C (en) | 2003-08-27 | 2004-07-20 | Image display apparatus, display unit driver and image display method for the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003303252A JP4927311B2 (en) | 2003-08-27 | 2003-08-27 | VIDEO DISPLAY DEVICE, DISPLAY UNIT DRIVE CIRCUIT USED FOR THE SAME |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010106873A Division JP5158128B2 (en) | 2010-05-07 | 2010-05-07 | VIDEO DISPLAY DEVICE, DISPLAY UNIT DRIVE CIRCUIT USED FOR THE VIDEO DISPLAY DEVICE, AND VIDEO DISPLAY METHOD |
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| Publication Number | Publication Date |
|---|---|
| JP2005070656A JP2005070656A (en) | 2005-03-17 |
| JP2005070656A5 true JP2005070656A5 (en) | 2005-12-08 |
| JP4927311B2 JP4927311B2 (en) | 2012-05-09 |
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| JP2003303252A Expired - Lifetime JP4927311B2 (en) | 2003-08-27 | 2003-08-27 | VIDEO DISPLAY DEVICE, DISPLAY UNIT DRIVE CIRCUIT USED FOR THE SAME |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7333081B2 (en) |
| JP (1) | JP4927311B2 (en) |
| CN (1) | CN100382590C (en) |
| GB (1) | GB2405520B (en) |
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